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120889 (1998 RT75)
Classification: Main-belt Asteroid          SPK-ID: 2120889
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1723397291650787 4.9434e-08  
a 2.236906731307276 7.6377e-09 au
q 1.851398831066238 1.1073e-07 au
i 6.617796982570293 5.4687e-06 deg
node 163.5294600548041 3.2946e-05 deg
peri 166.7992979028355 3.5145e-05 deg
M 198.3166534519987 1.1884e-05 deg
tp 2459549.323918671032
(2021-Nov-30.82391867)
4.0928e-05 TDB
period 1221.997286300071
3.35
6.2586e-06
1.714e-08
d
yr
n .2945996722218572 1.5088e-09 deg/d
Q 2.622414631548314 8.9539e-09 au
  Orbit Determination Parameters
   # obs. used (total)      632  
   data-arc span      7890 days (21.60 yr)  
   first obs. used      1998-09-14  
   last obs. used      2020-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50847  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:41:02  

Additional Information
 Earth MOID = .841489 au 
 Jupiter MOID = 2.73396 au 
 T_jup = 3.609 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.4   n/a MPO453679  

120889 (1998 RT75)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1998 RT75 = 2000 DW31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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